Visible to Intel only — GUID: tmq1513622135103
Ixiasoft
Visible to Intel only — GUID: tmq1513622135103
Ixiasoft
3.1.2.1.2. RX Adaptation Modes
Mode | Description |
---|---|
Initial adaptation | During initial adaptation, the adaptation engine adapts all of the RX analog front end (AFE) parameters to optimize the receiver eye opening and adjusts the vertical and horizontal sampling location accordingly.
Run initial adaptation under either of the following conditions:
|
Continuous adaptation | The goal of this adaptation is to maintain the signal quality at the sampler close to the initial adaptation over time and temperature.
|
For more details on Register Read/Write support and programming, refer to PMA Receiver Equalization Adaptation Usage Model and 0x000A: Receiver Tuning Controls to configure these parameters.
Parameter | Min | Max | Initial Adaptation | Continuous Adaptation | Manual Optimization Possible | Firmware Default |
---|---|---|---|---|---|---|
GainLF | 0 | 15 | Yes | Yes | Yes | 8 |
CTLE LF Min | 0 | 15 | N/A | N/A | Yes | 0 |
CTLE LF Max | 0 | 15 | N/A | N/A | Yes | 15 |
GainHF | 0 | 15 | Yes | Yes | Yes | 0 |
CTLE HF min | 0 | 15 | N/A | N/A | Yes | 0 |
CTLE HF max | 0 | 15 | N/A | N/A | Yes | 15 |
GS1 | 0 | 3 | No | No | Yes | 0 |
GS2 | 0 | 3 | No | No | Yes | 0 |
RF_P2 | -10 15 | 10 | Yes | No | No | 0 |
RF_P2_MIN | -1015 | 10 | N/A | N/A | Yes | -10 |
RF_P2_MAX | -1015 | 10 | N/A | N/A | Yes | 10 |
RF_P1 | 0 | 15 | Yes | Yes | No | 0 |
RF_P1_MIN | 0 | 15 | N/A | N/A | Yes | 0 |
RF_P1_MAX | 0 | 15 | N/A | N/A | Yes | 15 |
RF_P0 | -1515 | 15 | Yes | Yes | No | 0 |
RF_B1 | 0 | 8 | Yes | Yes | Yes | 0 |
RF_B0 | 0 | 5 | Yes | Yes | Yes | 0 |
RF_B0T | 0 | 50 | No | No | Yes | 0 |
RF_A - NRZ | 100 | 160 | No | No | Yes | 160 16 |
RF_A - PAM4 | 100 | 160 | No | No | Yes | 130 17 |
PMA Initial Adaptation Effort Status
- 0 = Low Effort (00_effort) is for NRZ Ethernet AN/LT and CPRI protocols only and is the quickest to complete. This meets the 500 ms compliance time for Ethernet and 100 ms compliance time for CPRI.
- 1 = Medium Effort (05_effort) is for the PAM4 Ethernet AN/LT protocol only, to meet the IEEE link-up time of 3 seconds.
- 2 = Full Effort (10_effort) is for general usage (NRZ and PAM4), to provide the best performance and stability, but takes the most time to complete compared to other initial adaptation efforts. This is the recommended adaptation mode.
See the "Loading PMA Configuration Register START_ADAPTATION" figure.
You can set the initial adaptation effort using attributes directly. See Initial Adaptation Effort Levels for information on the attributes to send.
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